某城镇污水处理厂设计毕业论文

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1、I 太湖流域某城镇污水处理厂设计 Design of a Sewage treatment plant for a city In Taihu Lake Basin II 摘摘 要要 太湖流域是著名的江南水乡，该流域的水资源问题日趋突出，表现在:水资源开 发和利用的程度增高，水资源保护的工作难度加大，水污染治理的步伐不及时，水体 污染比较严重，水资源的管理不协调等等。由于环境的退化，生物多样性和生态稳定 性下降，水生植物受到一定程度的破坏，水体的自净能力逐渐减弱，加之部分河道被 盲目侵占，其中堵塞也相当严重。太湖流域的水质主要的超标项目为氨氮、总磷、生 化需氧量和高锰酸盐指数。 UCT 工艺是

2、近几年才新起的污水处理工艺，在脱氮除磷方面有着独特的效果。 因此，研究 UCT 工艺的设计技术能够为改善城市废水的脱氮除磷效果提供重要的理 论基础。国内外的研究实践表明，该工艺不仅具有较高的 COD、BOD、SS 去除率， 而且在一定程度上解决了其它工艺在脱氮除磷方面面临的问题。 本设计针对太湖流域 某城镇排放污水，依照城镇污水处理厂污染物排放标准 (GB18918-2002)的一级 A 标 准，选择 UCT 处理工艺,设计污水处理厂。该流程主要包括预处理、生物处理、污泥 处理三部分。预处理包括格栅、沉砂池和初沉池；生物处理部分由 UCT 生化池（厌 氧池、缺氧池和好氧池）组成；污泥处理包括污

3、泥的浓缩和脱水。 关键词：关键词：城镇污水处理；UCT 工艺设计；脱氮除磷；太湖流域 III Abstract Taihu Lake is a famous Yangtze River Delta, water resources are becoming increasing prominent. the extent of water resources development and utilization of increased water conservation work more difficult, the pace is not timely water pollution

4、, water pollution is more serious , water management uncoordinated and so on. Due to environmental degradation, biodiversity and ecological stability decreased, subject to a certain degree of damage aquatic plants, water self-purification capacity gradually weakened, plus part of the river is blind

5、occupation, which is also very serious blockage.Water quality of Taihu Lake Basin major projects exceeding ammonia nitrogen, total phosphorus, BOD and permanganate index. UCT process is a new sewage treatment process, in the nitrogen and phosphorus has a unique effect. Therefore, the study process d

6、esign techniques can improve the effect of urban wastewater nitrogen and phosphorus provide an important theoretical basis. The result shows that the process has both a high COD、BOD、SS removal efficiency, but also removed when the other process in nitrogen and phosphorus removal problem. This design is focused on municipal sewage emission in Taihu Lake Basin, according to Class-I（A） criteria in Discharge standard of pollutants for municipal wastewater treatment plant(GB18918-2002), selects UCT p